Front unit for a sliding board binding, touring binding and ski-jumping binding

Abstract

The present invention relates to a front unit ( 10 ) for a sliding board binding, comprising two engagement elements ( 32 L, 32 R), which comprise engagement portions ( 16 L, 16 R) which are set up so as to engage opposite lateral portions ( 14 L, 14 R) of a sliding board boot ( 12 ), the engagement elements ( 32 L, 32 R) being held pivotably on the front unit ( 10 ), and a tensioning means ( 34 ), which produces a resilient force for biasing the engagement portions ( 16 L, 16 R) in the engagement direction, the tensioning means ( 34 ) comprising a displaceably held tensioning element ( 40 ), the conversion between the pivoting movements of the engagement elements ( 32 L, 32 R) and the displacement movement of the tensioning element ( 40 ) being provided by way of a lever mechanism, which comprises: two levers which pivot in a manner corresponding to the engagement elements ( 32 L, 32 R), a displacement portion which is displaced in a manner corresponding to the tensioning element ( 40 ), and an articulation element ( 48 ), which comprises a first and a second pivot point at which it is pivotably connected to the levers and comprises a third pivot point, positioned between the first and the second pivot point, at which it is pivotably connected to the displacement portion.

1 . Front unit for a sliding board binding, comprising
 two engagement elements, which comprise engagement portions which are set up so as to engage opposite lateral portions of a sliding board boot, the engagement elements being held pivotably on the front unit,   a tensioning means, which produces a resilient force for biasing the engagement portions in the engagement direction, the tensioning means comprising a displaceably held tensioning element,   
       characterised in that the conversion between the pivoting movements of the engagement elements and the displacement movement of the tensioning element is provided by way of a lever mechanism, which comprises:
 two levers which pivot in a manner corresponding to the engagement elements, 
 a displacement portion which is displaced in a manner corresponding to the tensioning element, and 
 an articulation element, which comprises a first and a second pivot point at which it is pivotably connected to the levers and comprises a third pivot point, positioned between the first and the second pivot point, at which it is pivotably connected to the displacement portion. 
 
     
     
         2 . Front unit according to  claim 1 , characterised in that the two levers of the lever mechanism are formed by the engagement elements. 
     
     
         3 . Front unit according to  claim 1 , characterised in that the engagement elements are held pivotably about a vertical axis. 
     
     
         4 . Front unit according to  claim 1 , characterised in that each of the two engagement elements is pivotably mounted on a bearing portion on the front unit, and comprises a first lever arm extending from the bearing portion to the engagement portion and a second lever arm extending from the bearing portion to the articulation element. 
     
     
         5 . Front unit according to  claim 4 , characterised in that the second lever arms of the engagement elements point towards a central longitudinal axis of the front unit. 
     
     
         6 . Front unit according to  claim 1 , characterised in that the displacement portion is formed on the tensioning element. 
     
     
         7 . Front unit according to  claim 1 , characterised by a spring means which is braced against the tensioning element. 
     
     
         8 . Front unit according to  claim 1 , characterised by a spring means which is braced on the one hand against the tensioning element and on the other hand against a spring bearing, which is rigidly fixed to the sliding board, the tensioning element penetrating a clearance of the spring bearing, and preferably further also the spring means. 
     
     
         9 . Front unit according to  claim 1 , characterised by an actuation element which is manually operable by the user, for moving the engagement portions between an engagement position, in which the engagement portions hold a sliding board boot in engagement, and an opening position, in which the engagement portions release the sliding board boot. 
     
     
         10 . Front unit according to  claim 9 , characterised in that the actuation element is pivotably coupled to a portion, which is rigidly fixed to a sliding board, of the front unit at a first actuation pivot axis (S 7 ), in that the actuation element is pivotably coupled to an actuation member at a second actuation pivot axis (S 8 ), and in that the actuation member is pivotably connected to an element of the lever mechanism, to one of the engagement elements or to the tensioning element at a third actuation pivot axis (S 9 ), the second actuation pivot axis (S 8 ) passing a dead position, in which it intersects a connecting line between the first actuation pivot axis (S 7 ) and the third actuation pivot axis (S 9 ), when the actuation element moves between the engagement position and the opening position. 
     
     
         11 . Touring binding, comprising a front unit according to  claim 1 . 
     
     
         12 . Touring binding according to  claim 11 , characterised in that the engagement portions comprise a projecting coupling journal in each case, the coupling journals ( 174 L,  174 R) of the two engagement portions facing towards one another. 
     
     
         13 . Ski-jumping binding, comprising a front unit according to  claim 1 . 
     
     
         14 . Ski-jumping binding according to  claim 13 , characterised in that the engagement portions comprise a coupling clearance in each case for receiving a coupling projection, which projects laterally from a front portion of a ski-jumping boot.